Sulfurized vat dye of the anthraquinone series.



ent invention, these thiaz ole dye's'are to be WILHELM nnnznnne AND wAIiTEn ianucx, or scnonnianne, NEAR nastiness,-

man ASSIGNORS T0 Aorist: ensnmscmirr run ANILIN FABRIKATION, or

BERLIN, GERMANY.

sunrumznn VAT DYE earns am'mrmemnonn sen-Ins.

No Drawing. I

Specification oflietters Patent. Application filed April 12, 1911. Serial n. 620,671.

Patented June'27; 1911.

dresses being Landshuterstrasse 2e and Neue Culmstr'assc 5 respectively, Schoneberg,

near Berlin, Germany, have invented certain new and useful Improvements in New S'ulfurized Vat Dyes of the Anthraquinone Series, of which the following is a specification.

In our application filed January th,

1911, and serially numbered 605,610 we'describe and claim among others sulfurized vat dyes of the anthraquinone series deriving from a monobenzyl or monobenzylideneecompound of 2.6- or 2.7-diamino-anthraquinone,,

which dyes possess most probably a so-called thiazole nucleus and on the other'side a free amino group. Now, according to our pres.-

.converted into new dyes by substituting in this amino group for a' hydrogen atom an acidyl group that is to say the residue ofan organic acid, such as for instance formyl, acetyl, benzoyl, phthalyl, malonyl, oxalyl, succinyl, etc; These new dyes are distinguished by a great intensity and good propert'ies;'they produce on cotton from a'suitable vat, generally speaking, clear and intense yellow tints. Y

In order to illustrate our invention the following examples may be given, the parts being by weight: g

Example 1: parts of the thiazole compound which is obtained by acting "with sulfur upon the monobenzylidene compound of 2.6-diaminmanthraquinine, and about 50 parts of acetic ,anhydrid are boiled together in a reflux apparatus. The orange-yellow amino derivative disappears very quickly during the heating and the new acetylated dye separates as a crystalline yellow precipi tate which isdrained, washed with water and dried. The new vat dye thus obtained forms-in the dry state when pulverized a yellow powder which is insoluble in alcohol,

benzene and glacial acetic acid and slightly soluble in nitrobenzene,'anilin, pyridin and dichlorobenzene to a yellow solution. It dis-o. solves in concentrated sulfuric acid to .ayellow solution from which'on the addition of ice yellow flakes are separated; in fuming sulfuric acid (25% of $0,) a brown-red solution is obtained. This new dye gives with hydrosulfite and an alkali a blue-red vat which by aging turns to a clear andintense which beta-naphthol yielding thus a red brown tint.

' Example 2: 35 parts of the sulfurized anthraquinone thia'zole compound derived quinone (compare Example 1) 350 parts of nitrchenz'eneand l5 partsof benzoyl-chlorid 'are heated together to boiling. The-benzoyl derivative separates as. a yellow substance which-is drained,='washed with water thus obtained yields a blue violet vat in which cotton is dyed blackish blue, passing to a brilliant clear yellow by exposure to air. "This new dye shows essentially the same physical and chemical behavior asthe new dyedescribed in Example 1,-

It is obvious to those skilled inthe art that our present invention is not limited to the foregoing examples or to the 'details the G-am'ino-anthraquinonyLLQ-phehyl thiazole the corresponding 7-amin o compound may be employed as well as; a mixture of thermore another acidyl group, such as fortroduced in the free amino group of the re- In producing such' another .acidyl derivative of course any other suitable method may e used. It is also convenient to state that any suitable indifi'e'rent solvent may 'be employed in carrying out the process of our invention. 4 f Having now described our invention and the manner in which it may be performed, what we claim is,

L'As new articles of} manufacture new series derived from an arithraquinone-thiazole and pdssessing an acidyl-amino group suitablekvat gives an orange yellow shade:

c n be diaz'otized and developed with from monobenzylidene 2.- 6-- diaminoanthra spective anthraquinonyl-1.2-phenyl-thiazole.

from which-cotton is dyed-a dark 'violet yellow, which is fast to washing, to chlorin and dried. The benzoylated new vat dye iven therein. Thus for instance instead of the 6-ami'noand 7-amino compounds. Fur- I nyl, oxalyl, malonyl, succinyl may be insulfurized' vat dyes of the anthraquinone NILR, R signifying the residue of an organic acid, these new dyes producing on 'cotton froin'a vatclear and intense yellow 'thiazole' compounds having a free amino group, and this aminoanthraquinone-thiazole when'dyed on cotton being capable of beingjdiazotized and developed with'betan'aphthol.

1 2. As anewarticle of manufacture the new 6 -acetyl amino anthraquinonyl 1.2-

phenyl-thiazole of the formula:

which dyes cotton fronia vata clear and I i i v I a intense yellow fast to washing, to chlorln and-to the action of light, which new dye the dry shape when powdered is a yellow powder practically insoluble in alcohol, befi zene and glacial acetic acid, but soluble in.

anilin, pyridin and nitrobenzene to a yellow solution, and this new dye dissolving in ooncentrated sulfuric "acid to a yellow solution from which solution on the addition of ice yellow flakes are separated, and which new dye in fuming sulfuric acid of 25% SO, dissolves to a brown red solution, this new dye if dissolved in concentrated sulfuric acid and this solution warmed on the water bath, being deprived of the acetyl group, the corresponding amino-thiazole with a free amino group resulting, which amino-thia-= zole when dyed on cotton from a vat gives an orange-yellow shade which can be d1azo tized and developed .with beta-naphthol yielding thus a red-brown tint. I a

In, testimony whereof we have hereunto set'our hands in presence; of two'subscribing witnesses.

WILHELM HERZBERG.

WALTER BRUCK.

\Vitnesses:

- lVoLnEMAR HAUPT, HENRY HASPER.

Gopiesof this patent may be obtained fol-five cents each, by addressing the Commissioner of Patents, I

t e Washington, D. G. 

